Stereoselective Synthesis of 1,1′‐Disaccharides by Organoboron Catalysis
作者:Sanae Izumi、Yusuke Kobayashi、Yoshiji Takemoto
DOI:10.1002/anie.202004476
日期:2020.8.10
2‐dihydroxyglycosyl acceptors and glycosyl donors in the presence of a tricyclic borinic acid catalyst. In this reaction, the complexation of the diols and the catalyst is crucial for the activation of glycosyl donors, as well as for the 1,2‐cis‐configuration of the products. The anomeric stereochemistry of the glycosyl donor depends on the employed glycosyl donor. Applications of the produced 1,1′‐disaccharides are
Selective One‐Pot Access to Symmetrical or Unsymmetrical Diaryl Ethers by Copper‐Catalyzed Double Arylation of a Simple Oxygen Source
作者:Anis Tlili、Florian Monnier、Marc Taillefer
DOI:10.1002/chem.201001373
日期:2010.11.2
Great CO‐mbination: A novel method is reported for the controlled one‐pot synthesis of various symmetrical or unsymmetricaldiarylethers by doublearylation of a simple inorganic oxygensource (see scheme). This versatile and highly selective process is based on the use of a cheap and low toxicity copper catalytic system.
Palladium-Catalyzed Oxidative Double CH Functionalization/Carbonylation for the Synthesis of Xanthones
作者:Hua Zhang、Renyi Shi、Pei Gan、Chao Liu、Anxing Ding、Qiuyi Wang、Aiwen Lei
DOI:10.1002/anie.201201050
日期:2012.5.21
Two at once: Xanthones with different functional groups were obtained with CO (balloon) in the presence of a simple catalytic system that consists of Pd(OAc)2, K2S2O8, and trifluoroacetic acid (see scheme). Preliminary mechanism studies reveal that the second CHfunctionalization might be the rate‐determining step.
一次两个:在简单的催化体系(由Pd(OAc)2,K 2 S 2 O 8和三氟乙酸组成)的存在下,用CO(气球)获得具有不同官能团的氧杂蒽。初步的机理研究表明,第二个CH功能化可能是决定速率的步骤。
INHIBITION OF P38 KINASE ACTIVITY USING SUBSTITUTED HETEROCYCLIC UREAS
申请人:Dumas Jacques
公开号:US20120046290A1
公开(公告)日:2012-02-23
This invention relates to the use of a group of aryl ureas in treating cytokine mediated diseases, other than cancer and proteolytic enzyme mediated diseases, other than cancer, and pharmaceutical compositions for use in such therapy.
Oxalohydrazide Ligands for Copper‐Catalyzed C−O Coupling Reactions with High Turnover Numbers
作者:Ritwika Ray、John F. Hartwig
DOI:10.1002/anie.202015654
日期:2021.4.6
long‐lived copper catalysts for couplings that form the C−O bonds in biaryl ethers. These Cu‐catalyzed coupling of phenols with aryl bromides occurred with turnovers up to 8000, a value which is nearly two orders of magnitude higher than those of prior couplings to form biaryl ethers and nearly an order of magnitude higher than those of any prior copper‐catalyzed coupling of aryl bromides and chlorides